Shimmer Shimmercapture User manual

ShimmerCapture

User Manual

Rev 0.5a

Realtime Technologies Ltd ShimmerCapture User Manual

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Realtime Technologies Ltd ShimmerCapture User Manual

Table of Contents

1. Introduction .........................................................................................................................4

1.1. Scope.......................................................................................................................................4

1.2. Pre-Requisites .........................................................................................................................4

2. ShimmerCapture on Windows .............................................................................................. 6

2.1. Starting ShimmerCapture........................................................................................................6

2.2. Connecting to a Shimmer........................................................................................................6

2.3. Configuring the Shimmer........................................................................................................8

2.3.1. Configuration Window....................................................................................................8

2.3.2. Configuring with/without the Shimmer Dock...............................................................12

2.4. Configuring a Shimmer GSR+ Expansion Board ....................................................................13

2.5. Configuring a Shimmer ExG Module.....................................................................................14

2.6. Streaming Data .....................................................................................................................18

2.7. Status bar ..............................................................................................................................19

2.8. Disconnecting from a Shimmer.............................................................................................20

2.9. Saving data to a local file ......................................................................................................20

2.10. Show/Hide Graphs ............................................................................................................21

2.11. 3D Orientation ..................................................................................................................21

2.11.1. 3D Orientation Visualisation .........................................................................................22

3. ShimmerCapture on Linux................................................................................................... 25

3.1. Pairing Bluetooth devices .....................................................................................................25

3.1.1. Requirements................................................................................................................25

3.2. Using the ShimmerCapture executable ................................................................................26

4. Appendix............................................................................................................................ 27

4.1. ShimDv2 File Format.............................................................................................................27

Realtime Technologies Ltd ShimmerCapture User Manual

1. Introduction

ShimmerCapture is a host side (PC) application that allows users to display and save data received

from a single Shimmer device streaming over Bluetooth. The application allows the configuration of

a range of parameters on the Shimmer3, and is primarily designed to demonstrate Shimmer’s

functionality. ShimmerCapture works in conjunction with the Shimmer3 LogAndStream firmware to

allow simultaneous streaming of data over Bluetooth as well as the logging of data to the on-board

microSD card. The current release of ShimmerCapture is available for use in Microsoft Windows

environments or in Linux.

1.1. Scope

ShimmerCapture is not intended to be the answer to all host side application requirements but

instead as a quick start application which for many users can act as a stepping stone for more

advance Shimmer applications. A number of design decisions focused on simplicity over more

advanced features and/or robustness, to allow the application to be as portable as possible.

1.2. Pre-Requisites

1. A Shimmer3 device programmed with the latest version of LogAndStream or BtStream

firmware or a Shimmer2/2r device programmed with the latest version of BtStream

firmware.

Note: The latest LogAndStream and BtStream firmware images are available for download

from our website

. These images can be loaded onto the Shimmer devices using the

Shimmer3 Bootstrap Loader Application (or the equivalent for Shimmer2/2r). See the

Shimmer User Manual for details.

Note: The Shimmer needs to be paired with the PC (over Bluetooth). For Windows, this

procedure is explained in the quickstart section of the Shimmer User Manual and the

corresponding tutorial video on YouTube

2. The latest ShimmerCapture executable, available on our website

3. Windows: Microsoft .NET Framework 4 is required. Most Windows Vista and Windows 7

computers will already have this installed. If this is not installed it can be downloaded from

http://www.microsoft.com/net/

The distributed application executable is targeted for .NET 4, but for developers who wish to

create their own executables there is no problem using .NET 3 or .NET 2.

http://www.shimmersensing.com/support/wireless-sensor-networks-download/category/19

https://www.youtube.com/watch?v=C2UdTdfiQ1g

http://www.shimmersensing.com/support/wireless-sensor-networks-download/category/21

Realtime Technologies Ltd ShimmerCapture User Manual

Linux: Mono Framework runtime is required. There are precompiled binaries for most

popular Linux versions, or, if necessary, it can be installed from source. For more information

see http://www.mono-project.com

Realtime Technologies Ltd ShimmerCapture User Manual

2. ShimmerCapture on Windows

2.1. Starting ShimmerCapture

Launch the ShimmerCapture application in Windows. Simply double click the application executable,

there are no installation steps.

2.2. Connecting to a Shimmer

The Bluetooth serial port for the desired Shimmer3, as assigned during the pairing procedure, must

be selected (for details on pairing a Shimmer device please refer to the Shimmer User Manual). This

can be selected using the drop down menu, or by typing the value in manually. In Windows this will

be in the form of “COM<nn>”. See Shimmer User Manual for more details.

Figure 2-1 Selecting the COM port. Step 1 - Select the correct COM port, Step 2 - press the "Connect"

button.

Once the correct serial port is selected, press the “Connect” button. While the ShimmerCapture

application is connecting to the Shimmer3, the status bar of the application will indicate the stage of

the connection sequence, as shown in Figure 2-2.

Realtime Technologies Ltd ShimmerCapture User Manual

Figure 2-2 ShimmerCapture in the process of connecting.

Once connected the other buttons on the Control window will be enabled and the status bar at the

bottom will be updated. The blue LED on the Shimmer will also illuminate to indicate connection

status.

Figure 2-3 ShimmerCapture display once connected.

An important feature to note in ShimmerCapture can be seen in Figure 2-3. Similar to previous

Shimmer Bluetooth streaming solutions, the "Stream" button enables streaming of data over the

Bluetooth connection. However, a new feature of ShimmerCapture is the ability to simultaneously

stream data over Bluetooth at the same time as logging to the on-board microSD card - which can be

enabled by pressing the "Log+Stream" button. In both cases, the data can also be logged locally to

the PC by selecting the appropriate option (Save to CSV) from the "Tools" menu.

Shimmer firmware version

ShimmerCapture version

Status bar

Simultaneous Logging and

Streaming feature

Realtime Technologies Ltd ShimmerCapture User Manual

While the Shimmer3 device (programmed with LogAndStream firmware) is logging to the on-board

microSD card, a Bluetooth connection can be established or disconnected at any time without

interrupting the SD logging operation.

2.3. Configuring the Shimmer

2.3.1. Configuration Window

Once ShimmerCapture is connected to the Shimmer3, it reads the current configuration saved on the

Shimmer3. To view or change this configuration select Tools -> Configuration. This will bring up the

general configuration window, as shown in Figure 2-4.

Figure 2-4 Configuring a Shimmer3 with programmed LogAndStream firmware.

Other than the “Toggle LED” command, no changes made in this window will be reflected on the

Shimmer3 until the “Apply”or “Apply All” button is pressed. The “Cancel” button will cancel any

changes made since opening this window, other than the effect of the “Toggle LED” command.

Note: The configuration panel settings cannot be changed while the Shimmer3 is in the

process of streaming data.

Sampling Rate:

This can be modified by selecting a different rate from the drop down menu.

Note: In the ShimmerCapture application, the sampling rate must be chosen from the

dropdown box. If the user types in a value other than those listed in the dropdown box this

value will be ignored during configuration.

Realtime Technologies Ltd ShimmerCapture User Manual

Toggle LED:

Pressing this button immediately toggles the red LED on the Shimmer.

Sensors to sample:

The sensors of interest can be selected here. In the configuration window, the Shimmer3's

accelerometers are labelled as LNAccelerometer (Low Noise Accelerometer) and

WRAccelerometer (Wide Range Accelerometer). The LNAccelerometer is an Analog

accelerometer (KXRB5-2042) which has a single range (± 2 g). The WRAccelerometer is a

digital accelerometer (LSM303DLHC) which has four different ranges (± 2 g, ± 4 g, ± 8 g and

± 16 g). The LNAccelerometer has lower noise levels when compared to the

WRAccelerometer.

The Shimmer3 also includes a Pressure sensor (BMP180). The pressure sensor's resolution is

configurable (ultra low power, standard, high resolution and ultra high resolution). Users

should take note of the maximum sampling rate of the BMP180 when selecting the

Shimmer3 sampling rate and the resolution mode - further details can be found in the

BMP180 data sheet. Enabling the pressure sensor also enables the BMP180's temperature

sensor channel.

In order to obtain meaningful data from the GSR and ExG (ECG or EMG) channels, the

appropriate sensor module must be attached to the Shimmer3. The GSR and ExG sensors

channels cannot be selected simultaneously as the Shimmer3's internal connector can only

be connected to one of the corresponding expansion boards at the time.

Enable 3D Orientation:

This will enable the Accelerometer, Gyroscope and Magnetometer, the orientation of the

Shimmer3 device in terms of Quaternions will now be calculated and displayed when the

user starts streaming again. Users should note that for best results, the Shimmer3 device

should be pre-calibrated using the Shimmer 9DoF Calibration application which is available

for download from the Members area at www.shimmersensing.com.

Enable Gyro-On-The-Fly Calibration:

This will enable the calibration of the gyroscope while the Shimmer device is streaming.

When enabled, the offset vector of the Gyroscope is recalculated when the Shimmer device

is found to be stationary. Implementation details can be found in the ShimmerCapture

source code.

Enable Low Power Magnetometer:

There are seven sampling rates for the Shimmer3 (0.75 Hz, 1.5 Hz, 3 Hz, 7.5 Hz, 15 Hz, 30 Hz,

75 Hz, 220 Hz). The Magnetometer sampling rate is set to 15 Hz (Shimmer3) when low

power magnetometer is enabled, otherwise the sampling rate of the Magnetometer is set as

close as possible to the current sampling rate of the Shimmer3 device.

Realtime Technologies Ltd ShimmerCapture User Manual

Enable Low Power Accelerometer:

When low power mode is enabled, the sampling rate of the WRAccelerometer

(LSM303DLHC) is set to 10 Hz. This low power mode will only be usable when the "WRAccel

Range" is selected to be between ± 4 g and ± 16 g.

Enable Internal Exp Power:

This option is used to power-on a module or expansion board connected to the Shimmer3.

WRAccel Range:

This field selects the accelerometer range using a drop down menu. The Shimmer3 features

a digital accelerometer (WRAccelerometer) which has a user selectable range of ± 2 g, ± 4 g,

± 8 g or ± 16 g. This field is greyed out and not configurable if the WRAccelerometer sensor is

not selected.

Enable Low Power Gyroscope:

When low power mode is enabled, the sampling rate of the Shimmer3's gyroscope is set to

31.25 Hz.

Gyro Range:

This field selects the gyroscope range using a drop down menu. The gyroscope on the

Shimmer3 four selectable ranges: 250 dps, 500 dps, 1000 dps and 2000 dps.

Pressure Resolution:

This field is used to set the resolution level of the Pressure sensor on the Shimmer3.

GSR Range:

This field selects the range of the GSR sensor using a drop down menu. When set to Auto-

Range, the most suitable range for the current reading is selected by the shimmer itself. This

field is greyed out and not configurable if the GSR sensor is not selected.

ExG Resolution:

Setting determines whether ECG/EMG data will be sent in 16-bit or 24-bit format. Users

should note that 24-bit is the default format provided by the chips on the ExG Expansion

Board and, if 16-bit data is selected, the 7 least significant bits and the 1 most significant bit

of the ECG/EMG samples will be discarded by the firmware before transmitting the data

over Bluetooth. In the instrument driver, the calibration procedure handles the different

data types.

ExG Gain:

Setting determines the software configurable gain of the ExG channels. The recommended

value for ECG or EMG data collection will be automatically chosen when the ECG or EMG

Realtime Technologies Ltd ShimmerCapture User Manual

sensor, respectively, is enabled. Please refer to the Shimmer ExG User Guide for ECG or the

Shimmer ExG User Guide for EMG for more details.

Baud Rate:

This field selects the baud rate of the Bluetooth module on the Shimmer3. Setting the baud

rate to a higher value should allow streaming of more channels at a higher data rates while

reducing packet loss. Note: In order to change the baud rate of the Shimmer3, the

Shimmer3 must disconnect, and then reconnect with the ShimmerCapture application. The

ShimmerCapture application automatically handles this disconnect/connect cycle but

sometimes fails when trying to reconnect with the Shimmer device. If this occurs, please

reconnect with the Shimmer as described in section 2.2.

Detect Expansion:

Pressing this button lets the user know which expansion board (if any) is attached to the

Shimmer3.

Logging Delimiter Format:

This field specifies the file delimiter (comma or tab) when logging data to the csv file on the

computer.

SD Logging Parameters:

Figure 2-5 Configuring logging options for Shimmer3 with programmed LogAndStream firmware.

Shimmer Name: Used to give an appropriate name to the Shimmer unit. The entry is limited

to 11 characters. If the field is left empty, the name will default to "idXXXX" where XXXX is

the Bluetooth ID number specific to the Shimmer.

Realtime Technologies Ltd ShimmerCapture User Manual

Experiment ID: Used to give an appropriate name to the current trial in the Shimmer unit.

The entry is limited to 11 characters and has a default value of “default_exp”.

Trigger Mode:

The trigger mode allows the user to select how they wish to start and end data logging. The

two available options are Undock Start and Push Button Start. The Push Button Start option

is reliant on the Shimmer3's dedicated user button which is orange in colour and located

beside the two LEDs. In ShimmerCapture, the default option is Push Button Start.

Undock start:

If enabled, the following process begins when the Shimmer is removed from the dock.

1. The Shimmer unit will go into standby mode for up to 3 seconds.

2. The Shimmer unit will read the configuration file and create the required

directories on the SD card.

3. The Shimmer unit will start SD logging.

SD logging will continue until the Shimmer unit is reset, powered off, replaced in the

dock or the battery runs out, whichever happens soonest. Alternatively, once connected

over Bluetooth through ShimmerCapture, pressing the "Stop" button on the

ShimmerCapture control panel will also halt SD logging.

Repeatedly resetting the Shimmer unit will result in multiple logging sessions on the SD

card.

Note: If using the Undock Start option, you must log for data for at least one minute to

ensure data is successfully written to the SD card.

Push Button Start:

If enabled, undocking the Shimmer unit or powering it on and off, the dock will trigger

the same steps 1 and 2 as above (i.e., standby for 3 seconds followed by configuration).

However, SD logging will not start until either the push button on the Shimmer3 unit or

the "Log+Stream" button in the ShimmerCapture Control panel is pressed. SD Data

logging ends when the Shimmer3's push button is pressed again or when the Shimmer

unit is reinserted into the dock. Enabling this option makes Push Button Select option

enabled and available for selection.

Note: For more detailed information on the operation of the Trigger Mode options, consult

the LogAndStream for Shimmer3 Firmware User Manual.

2.3.2. Configuring with/without the Shimmer Dock

A Shimmer3 (programmed with LogAndStream firmware) can be configured through

ShimmerCapture either with the Shimmer3 placed on the Shimmer Dock or with it in an undocked

Realtime Technologies Ltd ShimmerCapture User Manual

state. In both cases, ShimmerCapture will attempt to send the configuration information to the

Shimmer3 Infomem (i.e., a region of EEPROM memory in the Shimmer's microcontroller).

It is important to note that, on power-cycle or device reset, the LogAndStream firmware will attempt

to load the last configuration parameters saved to the Infomem. Failing this scenario, default

configuration values will be loaded. For more detailed information on the operation the

configuration file and Infomem , consult the LogAndStream Firmware User Manual.

Undocked

When the Shimmer3 is undocked, the configuration parameters are sent from the ShimmerCapture

application to the Shimmer3 where the firmware will automatically store the settings in Infomem. It

will also attempt to create (or overwrite) the configuration file on the microSD card.

Docked

In the docked state, as before, the Shimmer3 will save the configuration parameters to the Infomem.

Once undocked the firmware will attempt to create (or overwrite) the configuration file on the

microSD card

Note: A Shimmer3 programmed with LogAndStream firmware should not be configured

while it is placed on a Shimmer Multi Charger. In this state, the Shimmer3 thinks that it is

connected to a Shimmer Dock and will surrender control of the microSD card. The settings

will not be written to the configuration file and on next power-cycle or device reset, the

settings in Infomem will be overwritten with old configuration parameters.

Note: It is not recommended to dock the Shimmer unit while it is being configured or logging

data. The Shimmer unit should either be powered off or in standby mode whenever it is

docked.

2.4. Configuring a Shimmer GSR+ Expansion Board

An external sensor option for the Shimmer3 is the Shimmer GSR+ Expansion Board. Among other

capabilities, this can be used to interface a PPG (Photoplethysmography) sensor to a Shimmer3

device. To use PPG, the following must be enabled

Int ADC A13 - The output of the sensor connected to the GSR+ Expansion Board is measured

by the internal ADC A13

Internal Exp Power (to power the external sensor e.g. PPG)

PPG data output will be under the category 'Internal ADC A13'. For further functionality information

of the GSR+ Expansion Board, users are encouraged to read the GSR+ Expansion Board User Guide.

When using PPG users can use the PPG to HR algorithm to convert the PPG signal into Heart Rate

(BPM). Snapshot of the dialog box within the configuration panel is as shown:-

Realtime Technologies Ltd ShimmerCapture User Manual

The numerical combo box allows users to select the window size of the buffer to average over when

calculating Heart Rate.

2.5. Configuring a Shimmer ExG Module

The "Advanced ExG" tab in the "Tools -> Configuration" menu allows users to configure a ExG

Expansion Board.

Selecting "Advanced ExG" tab will open and ExG configuration form as shown below.

Figure 2-6 ExG Configuration window.

A selection of ExG filtering options are also provided in the “Advanced ExG” tab. If filtering is

enabled, the raw and calibrated data will be filtered. Users should note that not all sampling

frequencies are supported by the filters. For unsupported frequencies, with filtering enabled, the

data remains unfiltered. For the high-pass filters, frequency rates of 51.2 Hz, 102.4 Hz, 204.8 Hz,

250.1 Hz, 512 Hz and 1024 Hz are supported. For the band-stop filters, frequency rates of 250.1 Hz,

512 Hz and 1024 Hz are supported. These filters are 2nd order Butterworth filters whose coefficients

Realtime Technologies Ltd ShimmerCapture User Manual

can be found online

. Users should note that these filters are used as examples and that, depending

on use case and application, other filtering options might perform better.

There are three default settings that are available for selection: Default ECG, Default EMG and

Default ExG Test. For example, checking the "Default ECG" checkbox will update the 20 registers (i.e.,

10 register bytes for each ExG chip) on the user interface with the recommended default settings for

ECG. Note that the register values in the user interface is only sent to the Shimmer3 when the

“Apply” or “Apply All” button is pressed. Updating the ExG gain settings will also update the registers

in the GUI.

ExG Reference Electrode:

Setting determines whether the reference voltage used in the ExG amplifiers is a fixed

reference voltage generated by the chip or taken from a feedback channel on the body.

Please refer to the Shimmer ExG User Guide for ECG or the Shimmer ExG User Guide for EMG

for more details.

ExG Lead-Off Detection, ExG Lead-Off Current, ExG Lead-Off Comparator Threshold:

The ExG Lead-Off settings are used to enable lead-off detection mode for the Shimmer3 and

to choose the parameters for lead-off detection, such as the current applied to the body and

the threshold levels.

The user can also choose to configure their ExG unit using a custom configuration by entering their

desired configuration into the numeric text boxes list to the right of the "Chip 1" and "Chip 2" labels.

The following are the 10 register bytes name and description. More detailed information on the ExG

configuration bytes can be found within the ExG User Guide for ECG / ExG User Guide for EMG.

Byte Position

Name

Description

Byte 0

CONFIG1:

Configuration Register 1

This register configures each ADC channel

sample rate.

Byte 1

CONFIG2:

Configuration Register 2

This register configures the test signal, clock,

reference, and LOFF buffer.

Byte 2

LOFF:

Lead-Off Control Register

This register configures the lead-off detection

operation.

Byte 3

CH1SET:

Channel 1 Settings

This register configures the power mode, PGA

gain and multiplexer settings channels.

Byte 4

CH2SET:

Channel 2 Settings

This register configures the power mode, PGA

gain and multiplexer settings channels.

Byte 5

RLD_SENS:

Right Leg Drive Sense Selection

This register configures the selection of the

positive and negative signals from each channel

for the right leg drive derivation.

Byte 6

LOFF_SENS:

Lead-Off Sense Selection

This register selects the positive and negative

side from each channel for lead-off detection.

http://www-users.cs.york.ac.uk/~fisher/mkfilter/trad.html

Realtime Technologies Ltd ShimmerCapture User Manual

Byte 7

LOFF_STAT:

Lead-Off Status

The register stores the status of whether the

positive or negative electrode on each channel is

on or off.

Byte 8

RESP1:

Respiration Control Register 1

This register controls the respiration

functionality.

Byte 9

RESP2:

Respiration Control Register 2

This register controls the respiration and

calibration functionality.

Table 2-1 ExG Configuration Bytes Contents

ShimmerCapture provides a brief illustration of how the ExG lead off functionality can be used to

detect whether all ECG leads are connected to the ExG board. See the following steps for illustration.

1. Enable the Default ECG checkbox, set the ExG Lead-Off Detection to DC Current as in Figure

2-7 and press the “Apply All” button.

Figure 2-7 Advanced ExG tab for ECG lead off detection

2. Press the “Start”button to begin streaming the ECG signal and observer the “ExG Lead-Off

Detection”checkboxes.

Default ECG checkbox

ExG lead off detection

Realtime Technologies Ltd ShimmerCapture User Manual

Figure 2-8 Streaming ECG signal with all leads connected

3. Remove one of the ECG leads and observe the “ExG Lead-Off Detection” checkboxes.

Figure 2-9 Streaming ECG signal with RA lead disconnected

All leads connected

One lead, “RA”

disconnected

Poor quality ECG signal

High quality ECG signal

Realtime Technologies Ltd ShimmerCapture User Manual

When using ECG users can use the ECG to HR algorithm to convert the ECG signal into Heart Rate

(BPM). Snapshot of the dialog box within the configuration panel is as shown:-

The numerical combo box allows users to select the window size of the buffer to average over when

calculating Heart Rate.

2.6. Streaming Data

To stream data from the Shimmer3, press either of the “Stream only” or “Log+Stream” buttons on

the ShimmerCapture control panel. Alternatively, if "Push Button Start" is enabled from the “Logging

Options” configuration window, pressing the push button on the Shimmer3 device will automatically

start "Log+Stream" operations. To stop steaming and logging data, either press the "Stop" streaming

button on the control panel or press the push button on the Shimmer3 device. To stop streaming but

continue logging, press the "Disconnect" button on the control panel.

The following screen shot shows a Shimmer streaming seven channels of data. The labels above the

text boxes and on the graph windows show indicate the source of each channel..

Note: It is a known issue, that on rare occasions the parsing of the streamed data for LogAndStream

firmware can be incorrect when a large number of channels are enabled with one of the ExG

channels (ECG, EMG, ExG Test Signal). While Shimmer will make every effort to resolve this bug in a

future release, users are reminded that ShimmerCapture is not intended to be the answer to all host

side application requirements but instead as a quick start application which for many users can act

as a stepping stone for more advance Shimmer applications. If a user does experience this bug,

usually reducing the number of the channels the Shimmer is streaming eliminates the problem.

Realtime Technologies Ltd ShimmerCapture User Manual

Figure 2-10 Streaming Data.

2.7. Status bar

The ShimmerCapture status bar provides a useful source of feedback for the state of the Shimmer3

device and the LogAndStream firmware.

Connecting:

While ShimmerCapture is connecting the Shimmer3, the status bar is continually updated with the

current step in the Bluetooth connection sequence.

Figure 2-11 Status bar during Bluetooth connecting.

Bluetooth Streaming

After the "Stream only" button has been pressed, the status bar will change to "BT Streaming", as

below:

Figure 2-12 Status bar during Bluetooth Streaming only operation.

Once the "Stop" button is pressed from the "Stream only" mode, the following status bar text will

appear:

Realtime Technologies Ltd ShimmerCapture User Manual

Figure 2-13 Status bar after Bluetooth streaming only operation.

Logging and Bluetooth Streaming

When the "Log+Stream" button is pressed, the status bar will show the "BTStream + SDLog" label. In

addition to this, the current logging directory on the microSD card will also be listed. The name of

the current directory is based on the configuration parameters set in the configuration window - in

this case as those listed in Figure 2-4. In this example, the status bar lists the: trial name (i.e.,

"Trial4R"), configuration time (i.e., "1401898850"), device name (i.e., "Shimmer1") and folder

increment number (i.e., "001"). More information on the representation of the configuration time

can be found in the ShimmerLog User Manual.

Figure 2-14 An example status bar message during Bluetooth streaming and SD logging.

Once the "Stop" button is pressed from the "Log+Stream" mode, the status bar will show the

"Stopped" label as well as the last SD logging directory, as below:

Figure 2-15 An example status bar message after the "Stop" button has been pressed on the control

panel.

2.8. Disconnecting from a Shimmer

The “Disconnect” button in the Control window disconnects ShimmerCapture from the Shimmer.

From "Stream only" mode this will halt all activity on the Shimmer3 and it will return to idle mode

waiting for user input. From "Log+Stream" mode, the Bluetooth link will disconnect but the logging

of data to the SD will continue uninterrupted. Whilst the Shimmer3 is logging, the user can choose to

reconnect over Bluetooth at any stage and this will not interfere with the SD logging operation.

2.9. Saving data to a local file

The data being received by ShimmerCapture can be saved to a local file on the PC in a comma

separated value format (CSV). This facility can be enabled by selecting Tools → Save To CSV. A tick

mark will appear next to this item in the Tools menu when the data is being saved to file. Both raw

and calibrated data will be logged to the file. An option to save the data in a tab delimited format

can be found on the configuration window.

Selecting the "Save To CSV" option opens a new window asking for the name and location of the file

to be used. The name defaults to “ShimmerData.csv” and the location defaults to the user’s home

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